Vania



2 Sheets-Sheet 1.

(No Model.) I

S A M 0 H T H w & .R E M L L 0 V. W

MACHINE FOR SWAGING OR EXPANDING TUBES.

Patented Jan; 3, 1893.

2 Sheets-Sheet 2.

Patented Jan; 3, 1893.

li l agm lziz zfig @ilooo'r fli'tormqy' %wvm I m 1 Him It (No Model.)

W/VOLLMER, & W. H. THOMAS. MACHINE FOR SWAGING OR EXPANDING TUBES. No.489,439.

UNITED STATES PATENT OFFICE.

WILLIAM VOLLMER AND WILLIAM H. THOMAS, OF PHILADELPHIA, PENN SYL- VANIA,ASSIGNORS TO BURN HAM WILLIAMS & 00., OF SAME PLACE.

MACHINE FOR SWAGING OR EXPANDING TUBES.

SPECIFICATION forming part of Letters Patent N 0. 489,439, dated January3, 1893.

Application filed August 81, 1892. Serial No. 444,681-

To all whom it may concern.-

Be it known that we, WILLIAM VOLLMER and WILLIAM H. THoMAs, bothcitizens of the United States, and residents of Philadelphia,

Pennsylvania, have invented certain Improvements in Machines for Swagingor Expanding Tubes, of which the following is a specification.

The object of our invention is to construct [0 an improved machine forswaging or expanding metal tubes.

In the accompanying drawings:Figure 1, is aface view of our improvedcombined swaging and expanding machine; Fig. 2, is a section on the line1-2, Fig. 1; Fig. 3, is a detached View of the mandrel; Figs. 4 and 5,are detached perspective views of the swaging dies; Figs. 6 and 7, aredetached perspective views of the expanding dies.

A is the frame of the machine mounted on suitable legs and having twouprights A supporting the crank shaft B which has a crank 12 connectedto the head D by a connecting rod 0, this head slides vertically uponguides on the uprights A. The head D carries the upper die E while thelower die F is carried by the main frame A; these dies are attached tothe frame in any suitable manner, they are shown in the drawings asdove-tailed and keyed in place.

B is the driving shaft provided with a suitable belt wheel B and adaptedto bearings c c on the frame of the is geared to the shaft 13 throughthe pinion d 3 5 and gear wheel 01, the gear wheel is secured to theshaft by a disk 0 and screw 0 Mounted 011 the shaft B is a sleeve Bcarrying a disk 12 in which is a crank pin Z2 the sleeve is loose uponthe shaft but can be thrown into gear therewith by a clutch sleeve Gsplined on the sleeve B and having teeth 9 which engage with teeth d onthe gear wheel at. A clutch lever g is provided to throw the clutch intogear, a lug d on the wheel d acts 5 upon the lever to throw the clutchout of gear 1 at each revolution.

Supported on the bracket A at the rear of the frame A is a cylindricalbearing A for the plunger H, this plunger carries at its outer end themandrel h which is inserted into the machine; the shaft B" (No model.)

tube to be expanded. The plunger is operated from a rock shaft Ihavingan arm 2' which is connected, by a link 2', to a crank pin 2) on thedisk h The rock shaft I, has an arm 2' which extends into a slot h inthe mandrel H so that as the shaft I rocks the mandrel will move intoand out of the dies.

The mandrel is only used in expanding the tubes its mechanism beingthrown into gear by the clutch G and so timed that when the dies graspthe tube it is forced into the tube and expands it as shown in Fig. 8,the mechanism being thrown out of gear when the swaging dies are used asshown in Fig. 9.

The swaging dies we prefer to make double as shown, so that differentsized tubes can be swaged with the same dies, both ends of the dies maybe made alike so that when one side wears away the other side may beused. Directly back of the dies is secured a plate K which acts as acheck to prevent the pipes passing beyond the dies when the expandingdies are used. The tubes as shown by dotted lines in Fig. 2, aresupported bya stand havinga verticallyadj ustable portion 172, the tubesare held in position against the thrust of the expanding mandrel by across bar n tied to the frame A by tie rods N N, the tie rods are screwthreaded at their outer ends and provided with nuts n resting back ofthe cross bar n.

Our invention is especially applicable to swaging and expanding thetubes used in the construction of boilers especially locomotive boilers,but it will be understood that the invention may be used to swage andexpand other tubes without departing from our invention.

We claim as our invention:

1. The combination in a combined tube 0 swaging and expanding machine,of the dies, a crank shaft connected to one of said dies, an expandingmandrel adapted to move into said dies, a rock shaft for reciprocatingsaid mandrel, with a clutch for throwing said rock 9 shaft into and outof gear with the crank shaft, substantially as specified.

2. The combination of the frameA having uprights A, the crank shaft Bmounted on said uprights, ahead D, connected to the crank 10o of saidcrank shaft, the lower die carried by the frame and the upper diecarried by the head, with the reciprocated plunger at the back of theframe and in line with the dies, and rock shaft giving reciprocatingmotion to said plunger and connected to the driving mechanism,substantially as described.

3. The combination in a combined swaging and expanding machine of theframe A, the crank shaft supported thereby, a head mounted upon waysinsaid frame and connected to the crank of the crank shaft, die carried bythe head and die carried by the frame and reciprocated plunger in linewith the dies and back of the frame, and having a mandrel adapted topass between the dies, arock shaft WM. VOLLMER. WM. H. THOMAS.

Witnesses:

GEO. SCHABINGER, 'lnno. F. SCOTT.

